<!DOCTYPE html>
<html>
<head>
<style>
.btn-group .button { background-color: #4CAF50;
border: 1px solid green;
color: white;
padding: 15px 32px;
text-align: center;
text-decoration: none;
font-size: 16px;
cursor: pointer;
width: 150px;
display: block;
}
.btn-group .button:not(:last-child) { border-bottom: none;
}
.btn-group .button:hover { background-color: #3e8e41;
}
</style>
</head>
<body>
<h2>垂直按钮组</h2>
<div class="btn-group">
<button class="button">按钮</button>
<button class="button">按钮</button>
<button class="button">按钮</button>
<button class="button">按钮</button>
</div>
</body>
</html>